JP3192308U - Guide device for supporting pile driving - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly convenient guide device which can contribute to improvement of driving accuracy of support piles and shortening of construction period. SOLUTION: This is a guide device for driving a new pile Y from a completed part of a structure including an existing pile X to the ground of an unfinished part of the structure, and overhangs the existing pile in a cantilever shape. It has a main body portion 1 provided so as to be provided, a guide portion 2 provided at the tip of the main body portion through which a leading pile can be inserted, and a telescopic portion 3 provided at the tip of the main body portion so that the guide portion can be moved in the front-rear direction with respect to the main body portion. It is a feature. [Selection diagram] Fig. 1

Description

  The present invention relates to a guide device for driving support piles, and more specifically, when a support pile is driven from the completed part of the structure to the ground of the unfinished part when constructing a structure such as a bridge or a pier, The present invention relates to a guide device for improving the accuracy of a placement position of a support pile.

As a method of constructing structures such as bridges and piers, support piles are placed at predetermined positions on the ground, which is an unfinished part, and horizontal girders, main girders, lining plates, etc. There is a method of sequentially repeating a process of installing a structure as a completed part and placing a new support pile from the completed part.
This support pile placing method includes a method of driving a support pile based on a guide pile or guide frame installed in advance by a heavy machine arranged in the completed part, or a structure part already completed as shown in FIG. There is a method (patent document 1) in which installation of the guide pile or the like is omitted by locking a cantilevered scaffold to the base and driving a support pile through a guide provided at the tip of the scaffold.

JP 2012-162862 A

The applicant has found the following improvements from the conventional method in order to further improve convenience.
(1) Make the support pile guide position as close to the ground as possible.
(2) The support pile placement position should be adjustable in the longitudinal direction (bridge axis direction).
(3) The support pile placement position should be adjustable in the left-right direction (the direction perpendicular to the bridge axis).
(4) Improve the stability of the support pile by increasing the stability of the support pile during placement.
(5) Even when the guide device is cantilevered, the horizontal level can be easily maintained.
(6) It is not necessary to remove the guide device.

  Accordingly, the present invention has an object of providing a guide device that is excellent in convenience and can contribute to improving the accuracy of placing support piles and shortening the construction period.

The first device of the present application, which was made to solve the above problem, is a guide device for driving a new pile from a completed part of a structure including an existing pile to the ground of an unfinished part of the structure, A main body provided so as to project from the existing pile in a cantilevered manner, a guide provided at the tip of the main body, through which a preceding pile can be inserted, and the guide can be moved in the front-rear direction with respect to the main body. And a telescopic part. A guide device is provided.
The second device of the present invention is characterized in that, in the first device, the guide part is movable in the left-right direction with respect to the main body part.
A third device of the present application is characterized in that, in the first or second device, a plurality of the guide portions are provided in the vertical direction.
A fourth device of the present application is characterized in that, in any one of the first to third devices, the guide portion is configured to be connectable to a guide device used in a next placing process. Place to do.
The fifth device of the present application is characterized in that, in any one of the first to fourth devices, the main body is supported by a temporary support pile that is separately placed on the ground of an unfinished part. To do.
A sixth device of the present application is the bridge or pier in which the structure includes a main girder in any one of the first to fifth devices, and the main girder and the main body are connected to each other. It further has a hanging tool.

According to the present invention, at least one of the effects described below can be obtained.
(1) Since the guide device can be attached to an existing pile at a position lower than the main girder, the height of the guide portion can be as close to the ground as possible.
(2) The placement position of the support pile can be adjusted in the front-rear direction (substantially in the direction of the bridge axis) by providing the expansion / contraction part in the main body part.
(3) By making the guide portion movable in the left-right direction (substantially in the direction perpendicular to the bridge axis) with respect to the main body portion, the placement position of the support pile can be adjusted in the left-right direction.
(4) By providing a plurality of guide portions in the vertical direction, the stability of the support pile during placement can be improved.
(5) Since the main body is supported by the temporary support pile, the horizontal level of the cantilevered guide device can be reliably maintained.
(6) Since the main body portion and the already-constructed structure above the guide device are connected by the lifting tool, the horizontal level of the cantilevered guide device can be reliably maintained.
(7) The guide portion also functions as a connector with the main body portion used in the next support pile placing process.
(8) Removal of the guide device is unnecessary, and the construction period can be shortened.

The schematic side view of the guide apparatus which concerns on Example 1 of this invention. The schematic side view of the guide apparatus which concerns on Example 2 of this invention. The schematic side view of the conventional scaffold.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<1> Overall Configuration A guide device according to a first embodiment of the present invention will be described with reference to FIG.
The guide device according to the present invention is a device for placing a support pile on the ground of an unfinished portion from a completed portion of a structure including an existing pile.
Fig. 1 shows the use of the guide device according to the present invention in the construction in which the main girder and the lining board are arranged while the supporting piles are placed prior to the construction of a structure such as a bridge or a pier. An example of placing support piles is shown.
The guide device has at least a main body part 1, a guide part 2, and a telescopic part 3.
Details of each component will be described below.

<2> Main Body Part The main body part 1 is a member that is bridged between the existing pile X and the new pile Y.
Before the main body 1 is to place the new pile Y at a position (planned place to be placed) at a predetermined distance from the existing pile X, the main body part 1 can be moved from the completed part of the structure including the existing pile X to Install so that it cantilever out to the vicinity.
In FIG. 1, for convenience of illustration, the main body portion 1 is provided in the vicinity of the main girder, but it is desirable that the position where the main body portion 1 is provided be as close to the ground as possible.

<2.1> Shape Example of Main Body Part The shape of the main body part 1 is not particularly limited, but in this embodiment, the upper chord material 11 and the lower chord material 12, and the diagonal material constructed between the upper chord material 11 and the lower chord material 12 It has a truss structure consisting of thirteen.
By making the main body 1 a truss structure, it is possible to ensure strength and reduce the weight of the main body.
In the embodiment shown in FIG. 1, the main body 1 is constituted by connecting three truss pieces (a rear truss 1a, an intermediate truss 1b, and a front truss 1c) in the front-rear direction (bridge axis direction).

In addition, the length of the main body 1 can be set between any piles by appropriately adjusting the number of truss pieces and the length of the truss pieces, or by providing a mechanism capable of arbitrarily expanding and contracting the length of the truss pieces. Can correspond to the length.
Moreover, the main-body part 1 is provided with two or more toward the left-right direction (bridge-axis orthogonal direction), and those are connected and integrated by the hanging girder.
The main body 1 can be formed by appropriately processing a known support material.

<2.2> Connection Mode between Main Body and Existing Pile As a connection mode between the main body 1 and the existing pile X, various known structures can be used.
In this embodiment, the rear end of the rear truss 1c can be connected to the guide portion 2 through which the existing pile is inserted in the previous placing step.

<2.3> Maintaining Level by Suspension Tool Since the main body 1 has a cantilever shape, in order to maintain the horizontal level of the main body 1, it is desirable to provide a lifting tool 4 and suspend the cantilever side.
Various members such as a chain block can be used for the hanger 4.
It is desirable that both ends of the hanger 4 be connected at an angle, not at horizontal positions. This is because the burden on the hanger 4 becomes smaller when the main body 1 is lifted with an angle as much as possible.
Therefore, it is desirable to connect one end of the hanger 4 to the main beam A or the like located higher than the main body 1.

<3> Guide part The guide part 2 is a member for guiding a new pile to be laid.
The guide part 2 is provided at the tip of the main body part 1. In FIG. 1, a guide portion 2 is provided on the front end side of the front truss 1 c of the main body portion 1.

<3.1> Cylindrical body The guide part 2 has at least the cylindrical body 21 into which a support pile can be inserted.
The cylinder 21 can be provided with a known mechanism for adjusting the position of the support pile and a known mechanism for installing the main girder A and the horizontal girder.

<3.2> Connection Mechanism The guide unit 2 has a connection mechanism with the main body in addition to the cylindrical body 21.
In FIG. 1, an H-section steel 22 provided with a stiffener and a groove-shaped steel 23 connected to the H-section steel are used for the connection mechanism with the main body. A connection example between the H-section steel 22 and the channel steel 23 will be described later.
This connection mechanism also includes a mechanism for connecting the main body 1 of the guide device used for the next placement of a new pile.

<3.3> Height of Guide Part Since the guide part 2 is provided at the tip of the main body part 1, it is arranged at the same height as the main body part 1. Therefore, if the main-body part 1 is provided in the low position in the up-down direction (axial direction of the existing pile), the guide part 2 will also be located in a low place simultaneously.
When the guide portion 2 is at a low position, the distance between the support pile and the placement ground is shortened, so that the placement accuracy is further improved.

<3.4> Number of Guide Portions A plurality of guide portions 2 can be provided in the vertical direction so as to support a plurality of points with respect to one new pile.
In FIG. 1, the guide portions 2 are provided on the upper chord material 11 side and the lower chord material 12 side of the main body portion 1, respectively.
By providing a plurality of guide portions 2 in the vertical direction, the placement angle and placement position of the new pile Y can be more accurately ensured.

<3.5> Adjustment mechanism in the left-right direction A mechanism between the main body 1 and the guide 2 that can move the guide 2 relative to the main body 1 in the left-right direction (the direction perpendicular to the bridge axis). It can be set as the structure connected through these.
For example, in the case of a mechanism connected by a bolt and nut, a through hole for inserting a bolt is provided in either the main body 1 or the guide 2.
If this through hole is a long hole extending in the left-right direction, the guide portion 2 can be moved in the left-right direction (the direction perpendicular to the bridge axis) by sliding the bolt in the long hole and tightening it. Can be fixed in place.
In FIG. 1, a long hole is provided in the H-shaped steel 22, and a connection mode is provided in which the H-shaped steel 22 and the grooved steel 23 can be moved in the left-right direction.
In addition, the said adjustment mechanism is not limited to the said embodiment, A well-known mechanism can be utilized.

<4> Expansion / contraction part The expansion / contraction part 3 is a member for adjusting the position in the front-rear direction (bridge axis direction) in order to guide the new pile Y to be placed from now on to a predetermined placement position.
The extension / contraction part 3 can use a hydraulic jack 31 attached between the main body part 1 and the guide part 2. By the expansion and contraction of the jack 31, the position of the guide portion 2 in the front-rear direction can be adjusted.
In the present embodiment, one end of the jack 31 is attached to the upper chord member 11 or the lower chord member 12 of the main body 1, and the other end is attached to the slide member 32 connected to the guide portion 2.
In addition, the said expansion-contraction part 3 is not limited to the said embodiment, A well-known mechanism can be utilized.

<5> Usage Method An example of the usage method of the guide device of the present invention will be described.
(1) Installation of main body First, the main body 1 is attached from the completed part of the structure to the unfinished part.
As a location where the main body portion 1 is attached, the guide portion 2 into which the existing pile X is inserted in the previous placing step may be considered, but is not limited to this example.
(2) Lifting of the main body portion The main body portion 1 and the main beam A are connected by a lifting tool 4 made of a chain block, and the horizontal level of the main body portion 1 is maintained while adjusting the length of the chain block.
(3) Installation of the guide part The guide part 2 is attached to the tip of the main body part 1. In addition, this process is unnecessary when the guide part 2 is connected to the main body part 1 in advance.
(4) Position adjustment of the guide part Correct positioning is performed in the front-rear direction and the left-right direction with respect to each of the cylindrical bodies 21 of the guide part 2 located above and below using the expansion and contraction part 3 and the left-right adjustment mechanism.
Such positioning can be performed by laser ranging or the like.
(5) Placing a new pile After confirming that the guide portion 2 is positioned at an accurate position, the new pile Y is placed while being guided and supported by the guide portion 2.
(6) Installation of horizontal girders, etc. After the new pile Y has been laid, the structure is constructed by performing pile head processing, installation of horizontal girders, main girders and lining plates. After the structure is completed, the heavy machinery is advanced to the completed part.
(7) Summary By repeating these steps (1) to (6) sequentially, the support piles can be placed while providing a predetermined interval, and the structures can be constructed sequentially.

A guide device according to a second embodiment of the present invention will be described with reference to FIG.
In the guide device according to the present embodiment, instead of the hanger 4 described in the first embodiment, a temporary support pile 5 is placed in advance on the ground of an unfinished portion, and the main body portion is attached to the temporary support pile 5. 1 is supported.
Since the temporary support pile 5 is a member for supporting the main body 1 to the last, the placement accuracy as high as the newly installed pile Y is not required. Therefore, the temporary support pile 5 can perform the placement work to the ground from the completed part of the structure without using the guide function.
According to the present embodiment, it is useful when the hanger 4 cannot support the weight of the main body 1.
In addition, although it is set as the structure except the hanger 4 in a present Example, the structure which provided both the hanger 4 and the temporary support pile 5 may be sufficient.

  The guide device according to the present invention may have a configuration in which the left / right adjustment unit is excluded from the configuration according to the first or second embodiment.

  The guide apparatus which concerns on this invention is good also as a structure which made the guide part 2 single in the up-down direction (axial direction of a new pile) from the structure in any one of Example 1-3. For example, the upper chord material 11 and the lower chord material 12 may be tapered and a single guide portion 2 may be provided in the vertical direction.

DESCRIPTION OF SYMBOLS 1 Main-body part 11 Upper chord material 12 Lower chord material 13 Diagonal material 2 Guide part 21 Cylindrical body 22 H-shaped steel 23 Groove-shaped steel 3 Extendable part 31 Jack 32 Slide material 4 Suspension tool 5 Temporary support pile a1 Completed part a2 Unfinished part b Support Pile c scaffolding

Claims (6)

A guide device for driving a new pile from a completed part of a structure including an existing pile to the ground of an unfinished part of the structure,
A main body provided to be cantilevered from the existing pile;
Provided at the front end of the main body, and a guide part through which a preceding pile can be inserted;
An extendable part that makes the guide part movable in the front-rear direction with respect to the main body part;
A guide device comprising:   The guide device according to claim 1, wherein the guide portion is movable in a left-right direction with respect to the main body portion.   The guide device according to claim 1, wherein a plurality of the guide portions are provided in a vertical direction.   The guide device according to any one of claims 1 to 3, wherein the guide portion is configured to be connectable to a guide device used in a next placing process.   The guide device according to any one of claims 1 to 4, wherein the main body portion is supported by a temporary support pile that is separately placed on the ground of an unfinished portion.   The structure according to any one of claims 1 to 5, wherein the structure is a bridge or a pier including a main girder, and further includes a suspension for connecting the main girder and the main body. The guide device described.

Images